发明授权
- 专利标题: Internal combustion engine with improved thermal efficiency
- 专利标题(中): 具有提高热效率的内燃机
-
申请号: US11680468申请日: 2007-02-28
-
公开(公告)号: US07594467B2公开(公告)日: 2009-09-29
- 发明人: Shunichi Aoyama , Kenshi Ushijima , Katsuya Moteki
- 申请人: Shunichi Aoyama , Kenshi Ushijima , Katsuya Moteki
- 申请人地址: JP Yokohama
- 专利权人: Nissan Motor Co., Ltd.
- 当前专利权人: Nissan Motor Co., Ltd.
- 当前专利权人地址: JP Yokohama
- 代理机构: Global IP Counselors, LLP
- 优先权: JP2006-054590 20060301
- 主分类号: F02F3/00
- IPC分类号: F02F3/00 ; B22D19/08
摘要:
An internal combustion engine includes a piston adapted to reciprocate in a cylinder. The piston includes a first portion, a second portion, and a third portion. The first portion of the piston forms a crown surface of the piston, the second portion of the piston forms a piston ring groove of the piston with the piston ring groove arranged and configured to receive a piston ring, and the third portion of the piston forms a crankcase side surface of the piston with the crankcase side surface facing a crankcase of the engine. The second portion of the piston is formed of a material having a higher thermal conductivity than a material forming the first portion of the piston and a material forming a third portion of the piston.